package week5;

/**
 * Created by Administrator on 2016/3/30.
 */
import java.util.*;
public class Average2 {
    public static void main(String[] args) {
        try {
            Scanner console = new Scanner(System.in);
            double sum = 0;
            int count = 0;
            while (true){
                int number = console.nextInt();
                if (number == 0){
                    break;
                }
                sum += number;
                count++;
            }
            System.out.printf("平均 %.2f%n", sum / count);
        }catch (InputMismatchException ex){
            System.out.println("必须输入整数");
        }
    }
}
